Unscrew the mounting screws located at the top and bottom of the receptacle.
Metal receptacle box ground.
How to ground in metal boxes in a system with metal boxes the pigtail method is considered the most secure.
Carefully pull out the receptacle from the box as far as the wires allow and locate the green grounding screw near the bottom of the receptacle.
If you thought you couldn t ground.
You may need to cut the painted edge or plaster and pry it loose.
In this video i show how a metal box is correctly grounded back to the main panel.
Here are some electrical tip for home outlets use a plug in circuit analyzer to check to make sure your outlets are grounded and wired correctly.
Locate the grounding wire if applicable.
The metal parts on both receptacle and box are bare and free of rust paint or other contaminants.
Metal receptacle outlet boxes must be grounded and one method is to pigtail the ground wire so that it is attached to the outlet and the metal outlet box using a green grounding screw.
Briefly turn the power on and test that the receptacle is grounded by touching the leads of the neon tester to the ground lug and to the hot lug of the receptacle.
Use a new receptacle if the old one does not have a ground slot or ground lug.
Ground wires are spliced together and attached with a pigtail to the box and receptacle.
If a metal box is being used best practice is to insert a green grounding screw into the threaded hole in the back of the box or enclosure.
Attach the ground wire or cable to the metal box and to the receptacle ground lug.
You have removed the little paper plastic squares that capture the receptacle s screws on the yoke.